Sumitomo 19P7BPR Turning Insert TCMT21.51ESU AC8025P Carbide

Product Description

The SUMITOMO 19P7BPR is a solid carbide turning insert designed for precision metal cutting on CNC lathes and turning centers. It carries the ANSI designation TCMT21.51ESU and ISO code TCMT110204N-SU, and is manufactured in grade AC8025P with a CVD coating process. The triangular insert geometry features a 60-degree included angle, a 7-degree relief angle, and a positive rake configuration. With a 1/4 inch inscribed circle and a 1/64 inch corner radius, this insert delivers controlled chip formation through its ESU chip breaker design. Licensed machinists and CNC operators working on steel workpieces will find this insert suited to finishing and semi-finishing applications.

This insert is engineered primarily for steel workpieces, identified by primary workpiece material code P. The ESU chip breaker geometry promotes reliable chip evacuation during continuous turning passes, reducing the risk of chip buildup on the workpiece or toolholder. The TCMT style with screw-type insert holding method fits standard TCMT-compatible toolholders. Typical applications include turning of carbon steel, alloy steel, and similar P-code materials on production lathes in both job shop and high-volume manufacturing environments.

Key Features

• AC8025P manufacturer grade with CVD coating for wear resistance on steel
• TCMT21.51ESU ANSI designation with ESU chip breaker for controlled chip flow
• Positive rake geometry with 7-degree relief angle reduces cutting forces
• 1/64 inch corner radius suits finishing and semi-finishing pass requirements
• Screw-type insert holding method for secure seating in TCMT toolholders
• Meets ANSI and ISO 13399 standards for dimensional consistency

Compatibility

Designed for use in TCMT-style screw-clamping toolholders compatible with the TCMT21.51 insert seat. Primary workpiece material is steel (material code P). No specific machine or toolholder model numbers were provided in the product data.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the machine fully stopped and the spindle locked before changing inserts. Use the appropriate torx or hex key to the toolholder manufacturer's specified seating procedure when securing the clamping screw. Inspect the insert pocket and clamping screw for wear or debris before seating a new insert. Always verify insert orientation and chip breaker direction relative to the cutting direction before resuming operation.